Mechanical system for roasting sulfurous ores by a continuous process.



X. DE SPIRLET. MECHANICAL SYSTEM FOR ROASTING SULFUBOUS ORBS BY A CONTINUOUS PROCESS.

APPLICATION TILED M11318, 1913.

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: ragsur or-Fron XAVIER D'E srmLnn orf snussnLs ELciUrr MECHANICAL SYSTEM FOR noasrmssniruit'ocs ones BY- A courmimits rnocnss.

Applicatiqn filed March 18 sp i mec at nti PatentedOct.28,1913.

,1913. serum-755,159.

To all evil/2m, zit may concern.-

Be it known that I, Xavrnn- DE Srmmrr,

engineer, residing at 10 Avenue Bogier, Brussels, in the Klngdom of Belgium, have invented a new and useful Mechanical Systent for Roasting Si1lf1irous.-ores by a Continuous Process.

This invention isan improvement in or modification of that described in United States Patent No. 97 9,3d9, of date December 20th, 1910. It has been found that inthe construction shown in the-said prior specification, owing to the high temperature required for the complete desulfurizing of the blende for instance, and also, when the furnace is used for roasting pyrites rich in sulfur, there easily takes place in the floors where the pyrite or the blende falls in the center of t'he roasting hearth, an agglomeration of the pyrite or of the to the, commencement of fusion which is chiefly due to a comparatively large quan; tity of excessively hot ore concentrating tempo 'arily on a comparatively,small surface.

The drawback can be easily reduced or done away with, by m .=difying the arrangement oi the furnace, and the object of the present invention is'to do away with this drawback.

r construction according to this invention is illustrated. by way of example, in the accompanying drawing, in which:

F igui'e 1 is a section on line 1-].- of Fig. 2 certain parts being shown in elevation, of. a roasting furnace with one hearth, that is to say, with one stationary and one movable disk or plate. Fig. 2 is a horizontal section on-line 22 of Fig. l, and Fig. 3 1s a partial detail showing a modified form of teeth and ventilating passages for said teeth and root.

In the said construction, the disks or plates a b, lnstead of being circular, are annular.

In the example of a single floor furnace shown in Fig. 1,'the annular plate a, on the bottom face of whiclrare arranged the teeth (Z used for stirring the ore roasted on the bottom plate 5, is stationary. This disk a is supported outside by a series of columns '6 arranged at the, corners ot a polygon surrounding the furnace. It is also supported inside by columns f similar to the preceding ones and arranged at the corners of a poly- -innerrolling track j.. Rollers in 'plate to roll on the two tracks ]a j. The said plate is rotated by the engagement of the blende owing takes place in the direction opposite to that gun in the central hollow space 0 of the furnaces.

vThe columns e supporton arms or brackets g a circular outside rolling track it. The columns f support on brackets 2' an Z, the pins of which are respectively secured to the outer circle m and to the inner circle 72 of the roasting plate I), thus enable the said pinion 0 of the spindle p with atoothed rim 9' which surrounds all the rollers 70.

The stationary plate a is provided with a hopper 1* for supplying the ore, near the inner edge of the said plate. The plate I) is provided with an opening for the fall of the roasted ore at 8 near its outer edge.

.The teeth (Z secured in the ceiling of the arch of the stationary plate a, are refractory material, in the same way as the plate itself. These teeth are shaped and arranged so as to shift the ore from the center toward the periphery of the movable plate 6 where' the discharge hole or provided.

The heating of the furnace and the circulation of hot gases' take place in any suitable manner. This circulation preferably holes '8 is of the movement of the ore.

For certain ores, the roasting of which produces an" excessively high temperature injurious to proper working and startsfusion which may clog the teeth, itmay be of importance to avoid the said excess of temperature. This. invention provides means'for obviating the drawback by cooling both the plates or roasting hearths and the teeth used for turning over, stirring and shifting the ore. A circulation of cold air or gas isproducedin conduits such as t provided in the "bricks of the arch and in the teeth (2 of the same as shown in Fig. 3. \Vhenfixed or stationary hearths are employed, there is no difiiculty in bringing about such-circulation. The circulation of air or gas thus heated during the passage throughthe said conduits, can'be utilized for special purposes in the works treating the ores. For the purpose ozt'producing the said circulation, the ventilating space 0 can be used as a-natural means.

The arrangement of the disks or plates in annular shape enables the furnace to be 119 given a very large roasting surface, Without fear of drawbacks due to a bility caused by the use of of an excessive diameter,

5 question must be always in a roasting furnace.

Having now particularly described and my said invention the same is to be perascertained the nature of and in what manner 10 formed, I declare thatwhat I In a roasting furnace, hearth, a fixed annular roo want of staa circular arch the arch 1n too much curved claim is a rotary annular f above said hearth, a series of teeth suspended from said root, said roof and, teeth being provided with ventilating passages arranged to extend continuously through alternate portions of the roof and the teeth.

In testimony whereof I aflix my signature in presence of two Witnesses.

XAVIER on SPIBLET.

lVitnesses:

L. Pamrr'rn, CHAS. BOY NASMITLE, 

